You can use sudo when running dbnodeupdate.sh and patchmgr (and dbnodeupdate Orchestration).

• Running patchmgr (and dbnodeupdate Orchestration) Using sudo
  You can run patchmgr (which is packaged in dbserver.patch.zip) using sudo to perform any of patchmgr's functionalities, such as patching cells, patching RDMA Network Fabric switches, or orchestrating dbnodeupdate.sh execution.
• Running dbnodeupdate.sh Using sudo
  Before using dbnodeupdate.sh using sudo, you configure the /etc/sudoers file.